API 5L X70 PSL1 Pipe are used in onshore and offshore oil and gas pipelines requiring critical service, high performance and tight tolerances.
API spec 5L Specification for Line Pipe
Transportation of petroleum and natural gas;
Sour service; Offshore service
3. Chemical Requirements
4. Available Size Range
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5. Processes requiring validation
Final operations performed during pipe manufacturing that affect attribute compliance as required in this International Standard (except chemical composition and dimensions) shall have their processes validated.
Those processes requiring validation are the following:
⎯ for seamless, as-rolled pipe: final reheating practice and hot sizing or stretch-reducing;
if applicable, upsetting, cold finishing;
⎯ for seamless, heat-treated pipe: heat treatment;